Oil drip from bottom of oilfilter can...
 

Looks like its coming from the oil pressure gauge line. Is there washer or soemthing in there? Last leak to fix on the car before I switch to synthetic.

Assuming you're talking about a W123? It is just a hollow ferrule nut (similar to brake line nuts) the tube passes thru and there is a brass compression nipple with hose barbs that pushes into the tube. The other end of the nipple is just a bowl shaped compression fit, like what is used on the old propane bottles or oxyacetylene bottle connections. Every time I've gone to loosen one it has swelled in there pretty tight from heat cycling, so be careful getting it off, I would suspect the tube is just getting loose on the barbs.